diff --git a/domains/zmail._domainkey.soisyearbook.is-cool.dev.json b/domains/zmail._domainkey.mail.soisyearbook.is-cool.dev.json
similarity index 90%
rename from domains/zmail._domainkey.soisyearbook.is-cool.dev.json
rename to domains/zmail._domainkey.mail.soisyearbook.is-cool.dev.json
index 9503b99d..381ff46f 100644
--- a/domains/zmail._domainkey.soisyearbook.is-cool.dev.json
+++ b/domains/zmail._domainkey.mail.soisyearbook.is-cool.dev.json
@@ -3,7 +3,7 @@
     "description": "The domain for project use",
     
     "domain": "is-cool.dev",
-    "subdomain": "zmail._domainkey.soisyearbook",
+    "subdomain": "zmail._domainkey.mail.soisyearbook",
     
     "owner": {
         "email": "17sdheeraj-opendomains@wingarr.eu.org"